"This is important so that both tigers can get on with others belonging to their own kind in the future and hopefully start a family of their own," Manfred Niekisch, director of the Frankfurt Zoo, told Agence France-Presse earlier this month.

Daseep (at left in the photo above) was a surprise birth; her mother, Malea, was believed to be infertile. She and Tschuna are important new additions to their respective tiger subspecies, both of which are endangered.